In a genetics lab, kim and maria infected a sample from an e. coli culture with a particular virulent bacte- riophage. they noticed that most of the cells were lysed, but a few survived. the survival rate in their sample was about 1 x 10-4. kim was sure the bacte riophage induced the resistance in the cells, while maria thought that resistant mutants probably already existed in the sample of cells they used. earlier, for a different experiment, they had spread a dilute suspension of e. coli onto solid medium in a large petri dish, and, after seeing that about 105 colonies were growing up, they had replica-plated that plate onto three other plates. kim and maria decided to use these plates to test their theories. they pipette a suspension of the bacteriophage onto each of the three replica plates. what should they see if kim is right? what should they see if maria is right?

Cultures of the lake of the ozarks water samples were grown on enrichment media for identification. however, these organisms are present to some degree in all samples. an important question from a clinical perspective is whether or not there is a significant increase in the fecal coliform populations that would put people's health at risk. if you were part of the team investigating this outbreak, how would you best enumerate the fecal coliform threat? view available hint(s) cultures of the lake of the ozarks water samples were grown on enrichment media for identification. however, these organisms are present to some degree in all samples. an important question from a clinical perspective is whether or not there is a significant increase in the fecal coliform populations that would put people's health at risk. if you were part of the team investigating this outbreak, how would you best enumerate the fecal coliform threat? direct microscopic counts filtration count culture serial dilution count culture plate count culture

Which medullary index indicates a human hair? a. 0.653 b. 0.733 c. 0.516 d. 0.256

Compare and contrast cladistics and phylogeny. what are their advantages and disadvantages? which is the most useful in understanding how an organism developed into its current form? which concept most strongly supports your opinion about the origin of any given organism?